fuel cut @ 11 pounds?? need help!!

[Gamatron]

hey, i just put on a gfb boost controler (best $70 that i have ever spent as it holds the boost alot better than my previous turbosmart bleed and doesnt spike as much)

Im 97% sure its set up correctly, but im getting like what would happen if you hit the rev limiter? - thats the best discription i could give...

is this a fuel cut or will i need better spark plugs as the boost is blowing the sparks out?

any one else had this problem? or kno what wrong?

thanks guys.

[Jason Laurie]

Hey the problem sounds kind of the same as the one that I am having I had turned my boost up to about the same but mine would ping a little bit. I am told that it is the computer needs to be up graded as it is only standed. hope this helps..

[benm]

i raced a s2 r33 lastnight and was dead even, and i had that possible fuel cut. if i fixed this problem id chop him. in my lil s1 33.

Their is no difference, it all comes down to mods and the driver.

[BHDave]

At what point does this happen? I am hitting a fuel cut at just on 7k. What is the rev limiter set at on the rb25?

[Sarkis]

I had the same problem at 12 PSI, as soon it hit redline, it had a fuel cut.

But it seemed to be overheating? as it was a hot day, now its fine...

[benm]

Rev limit is at 7,200rpm.

[BHDave]

Just went for a spin and logged what happens when i hit the mystery cut.

At exactly 6850rpm, it's a rev limiter, nothing else was even close to maxing out. Where's my extra 500rpm gone. stupid ecu.

[PlasticStan]

Sounds like your coils are stuffed, had the same on my S1 R33.

[benm]

reset your ecu.

[Col-GTSX]

Dont race... and if you do.... dont post it.....

As previously stated many times before....

Question "Why are you running a $70 part in a $15,000+ car"????

Do it properlly, buy an elecronic boost controller and fuel cut defender.....

Also i hope you have an exhaust and front mount... 11psi is the absolute max you should run on a stock setup...

[GTR_Legend]

Ppl's,

I had a problem this morning with my R33 96 S2, i have had it for a couple of days. It has a FMIC, exhuast, BOV, POD & running at 11psi (so they say).

I have given it a bit through 2nd & 3rd gear, but this morning i was in 4th@60-70kph & when i accelerated and it hit boost, it cut out, is this the boost cut.

Just dont see why i did not get this problem in 2nd or 3rd gear.

Any idea's.

PS, i dont know how they are making it do 11psi, no EBC or adjustable T piece in the engine bay, but i was told it hit 12-13 psi when it was dynoed.

[Gamatron]

PROBLEM SLOVED!!!!!!! :headspin:

i did my homework on this problem and found that it was misfire... ( The extra boost blows out the spark before combustion ) As the stock sparkies are only set up for stock boost. When looking through my lil bros hot4's mags i found a 3page article on sparkplugs. Regapping your plugs from 1.1 (stock) to 0.8 should fix this problem. AND DID MINE :headspin:

There is a cheep way to fix this if your on a budget and a expencive way. i chose the expencive way...

CHEEP WAY.

Go to your local hardware store and get a spark plug gapping tool. Not sure what they are called but they tell you what size your gap is.

Pull your plugs out and tap the tip on a hard surface, then with your new gapping tool ajust it to 0.8, put your sparkies back in, up tha boost n take it 4 a spin.

You can get aftermarket 0.8 pre gapped plugs from autobahn for under $5ea.

EXPENCIVE WAY.

I got the NGK Iridium ix plugs. I payd $20 each and that was with a discount. but if you have future plans of upping the boost above 13psi these pluge are recomended.

as the 6 type stay colder... ive heard ov ppl uping there boost that hard that there sparkies golw red and ignite the fule with out a spark.. trust me you dont want this to happen. you can even go 7 but thats only recomended for over 2bar.

Iridium plugs stay cleaner then your average plugs and are anit-oxidation and anti-corrosion, they apparently last forever too. :headspin:

these plugs are gapped to 0.8 already so you dont have to fcuk around trying to get the correct gap size.

Mad free advertising for NGK...

I :ghost: If you have ever changed your plugs (skyline owners) youl know that its a mission :ghost: took me and a mate well over an hour :ghost:

Do your homework before you go out and spend hundreds of $$ on plugs, but in my oppinion its better than a dead rb25. and well worth it.

[TTT]

wow.. another R33 with increased boost and missfire thread..

perhaps someone should write some code that doesn't let you post a question before you do a search for it.

[GTR_Legend]

Thanks Gamatron

I will check out the gaps on my skyline, i had a R33 S1, that was boosted too 10psi running the stock plugs & it was fine but i did end up changing them too NGK Iridiums.

[benl1981]

Hey Gamatron. I've got a similar problem it feels almost like a rev limit, very harsh stop in the power. I'm thinking coil packs but others say it may be boost cut. Did yours feel like a boost cut?

This is only at 9.5psi.